插入MySQL的列記錄到第二個表具有不同的列名

Question

我有一個表稱爲

爲了

| id | created | customer_id | ... | ... | 

我想與記錄移動創建的列和CUSTOMER_ID等第二表稱爲

order_meta

| id | order_id | meta | value | 

使元是「創造」和值從訂單的表

創造價值這是可以做到用MySQL查詢或者我需要爲此創造一個腳本？

Answer 1

這是你想要的嗎？

insert into order_meta (order_id, meta, value) 
    insert id, 'created', created 
    from orders; 

如果你想要更多的非規範化列，你可以這樣做：

insert into order_meta (order_id, meta, value) 
    insert id, m.meta, 
      (case meta when 'created' then created 
         when 'customer_id' then customer_id 
      end) 
    from orders o cross join 
     (select 'created' as meta union all 
      select 'customer_id' as meta 
     ) m 

Answer 2

INSERT INTO order_meta (order_id, meta, value) 

SELECT id, 'created', created 

FROM order